(19)

(11)

EP 3 216 179 A1

(12)

(43) Date of publication: 13.09.2017 Bulletin 2017/37 (21) Application number: 15730825.5 (22) Date of filing: 08.06.2015

(51) International Patent Classification (IPC):  H04L 12/715(2013.01) H04L 12/725(2013.01) H04L 12/707(2013.01) H04L 12/721(2013.01) H04L 12/751(2013.01) (86) International application number: PCT/FI2015/050394 (87) International publication number: WO 2016/071558 (12.05.2016 Gazette 2016/19)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 05.11.2014 FI 20145966 (71) Applicant: Coriant Oy 02630 Espoo (FI)	(72) Inventors: HALLIVUORI, Ville FI-02610 Espoo (FI) KULMALA, Marko FI-02750 Espoo (FI) POUTANEN, Antti FI-02110 Espoo (FI) (74) Representative: Finnpatent Oy  Smart Chemistry Park Raisionkaari 55 21200 Raisio 21200 Raisio (FI)